Does the type of coolant I use matter as long as I used extended life? Can I mix whats in there.....

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Old 02-09-2005, 06:36 PM
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Default Does the type of coolant I use matter as long as I used extended life? Can I mix whats in there.....

with another brand?
Old 02-09-2005, 07:00 PM
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Default No, your 100/A6 either used Pentosin blue (which was OEM coolant up to 8/96) or...

Pentosin red, which is the current coolant used by Audi/VW. These fluids are special types of coolants and are not compatible for mixing either together or with any other coolant (e.g., Prestone). I've heard about a Audi/VW purple coolant that can be added to either the blue or the red OEM coolamts, but I haven't actually seen this fluid. As far as using a differnt type, I would stick with the Pentosin coolants since they are specially formulated for the German cooling systems.
Old 02-10-2005, 05:58 AM
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Default Very important: do not mix different colored coolant.

red with green/blue will produce some chemical reaction and a lot of gas.
Old 07-25-2009, 09:02 PM
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I have a 2.7t 2000 a6 and the service manual says to use g12 (purple)it also goes on to say that you shouldn't mix green g11 with purple g12 make sure to use 40% antifreeze minimum
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